diff --git a/plugins/POS.py b/plugins/POS.py
index b8ead8f..7ebe2fb 100644
--- a/plugins/POS.py
+++ b/plugins/POS.py
@@ -209,7 +209,7 @@ def slowwrite(self, y):
     def bon(self, bonID):
         if bonID in self.bonnetjes:
             self.open()
-            self.slowwrite(self.bonnetjes[bonID]["bon"].encode())
+            self.slowwrite(self.bonnetjes[bonID]["bon"])
             return True
         return False
 
diff --git a/plugins/declaratie.py b/plugins/declaratie.py
index 5bea3b2..a8fd2b9 100644
--- a/plugins/declaratie.py
+++ b/plugins/declaratie.py
@@ -56,12 +56,13 @@ def amount(self, text):
             return True
         try:
             value = float(text)
-            if 0 < value < 5000:
+            if -5000 < value < 5000:
                 self.value = value
                 if self.soort == "verkoop":
                     self.master.send_message(
                         True, "message", "Why do you give us E %.2f?" % self.value
                     )
+                    self.value = -self.value
                 elif self.soort == "declaratie":
                     self.master.send_message(
                         True, "message", "Where did you spend E %.2f on?" % self.value
@@ -138,7 +139,7 @@ def runasbar(self, text):
             return True
         try:
             value = float(text)
-            if 0 < value < 5000:
+            if -5000 < value < 5000:
                 if value > self.value:
                     return self.askbar(
                         "E %.2f is larger than E %.2f ; " % (value, self.value)
@@ -229,7 +230,7 @@ def runasbank(self, text):
             return True
         try:
             value = float(text)
-            if 0 < value < 5000:
+            if -5000 < value < 5000:
                 if value > (self.value - self.asbar - self.ascash):
                     return self.askbank(
                         "E %.2f is larger than E %.2f ; "
diff --git a/plugins/stock.py b/plugins/stock.py
index 2037f25..29326dc 100644
--- a/plugins/stock.py
+++ b/plugins/stock.py
@@ -78,12 +78,12 @@ def writestock(self):
     def voorraad_amount(self, text):
         try:
             aantal = int(text)
-            if not 0 < aantal < 5000:
+            if not -1 < aantal < 5000:
                 self.master.donext(self, "voorraad_amount")
                 self.master.send_message(
                     True,
                     "message",
-                    "Please enter a number between 1 and 4999, how much "
+                    "Please enter a number between 0 and 4999, how much "
                     + self.prod
                     + " is in stock?",
                 )
diff --git a/plugins/undo.py b/plugins/undo.py
index d20b251..1decec2 100644
--- a/plugins/undo.py
+++ b/plugins/undo.py
@@ -79,6 +79,9 @@ def doundo(self, text):
                     ),
                 )
                 return True
+            else:
+                print(self.undo.keys())
+                print(f"transID not in undo: {transID}")
             self.listundo()
             return True
         except:
@@ -131,7 +134,8 @@ def listundo(self, restore=False):
         for transID in self.undo.keys():
             txt = ""
             for usr in self.undo[transID]["totals"].keys():
-                txt += usr + " €" + "%.2f" % self.undo[transID]["totals"][usr] + " "
+                txt += " €" + "%.2f" % self.undo[transID]["totals"][usr] + " "
+                #txt += usr + " €" + "%.2f" % self.undo[transID]["totals"][usr] + " "
             txt += time.strftime(
                 "%Y-%m-%d %H:%M:%S", time.localtime(transID + 1300000000)
             )